Aal-i-Imraan 3:173

those[82] to whom people[83] said, “Indeed, the people have gathered against you, so fear them.” But it only increased them in faith, and they said, “Allah is Sufficient for us, and He is the best Protector[84].”

[82] The believers.
[83] The hypocrites. [84] This is one of the greatest Dhikr (remembrance) during times of hardship. Ibn ‘Abbās (رضي الله عنهما) reported: “Hasbunā Allāh wa ni‘ma al-Wakīl (Allah suffices us, He is the best of Protectors), was said by Abraham (عليه السلام) when he was thrown in the fire and was said by Muhammad (ﷺ) when it was said: “People have regrouped for you, so fear them”, their belief grew firmer and they said: “Allah suffices us, He is the best of Protectors”.” [Al-Bukhārī: 4563]

Those to whom people [i.e., hypocrites] said, "Indeed, the people have gathered against you, so fear them." But it [merely] increased them in faith, and they said, "Sufficient for us is Allāh, and [He is] the best Disposer of affairs."[150]

[150] The one entrusted and relied upon; sufficient to manage all matters.

173. Those (i.e. believers) unto whom the people (hypocrites) said, "Verily, the people (pagans) have gathered against you (a great army), therefore, fear them." But it (only) increased them in Faith, and they said: "Allâh (Alone) is Sufficient for us, and He is the Best Disposer of affairs (for us).[33]"

[33] (V.3:173) Allâh’s Statement:- "Those (i.e. believers) unto whom the people (hypocrites) said, ‘Verily, the people (pagans) have gathered against you (a great army), therefore, fear them.’ "
a) Narrated Ibn ‘Abbâs رضي الله عنهما: (The saying:) "Allâh (Alone) is Sufficient for us, and He is the Best Disposer of affairs (for us)" was said by Ibrâhîm (Abraham) عليه السلام when he was thrown into the fire; and it was said by Muhammad (صلى الله عليه وسلم) when they (i.e. hypocrites) said, "Verily, the people (pagans) have gathered against you (a great army), therefore, fear them," but it (only) increased them in Faith and they said: "Allâh (Alone) is Sufficient for us, and He is the Best Disposer of affairs (for us)." (V.3:173) (Sahih Al-Bukhâri, Vol.6, Hadîth No.86).
b) Narrated Ibn ‘Abbâs رضي الله عنهما: The last statement of Ibrâhîm (Abraham) عليه السلام when he was thrown into the fire, was: "Allâh (Alone) is Sufficient for me and He is the Best Disposer (of my affairs)." (Sahih Al-Bukhâri, Vol.6, Hadîth No.87).

Those unto whom men said: Lo! the people have gathered against you, therefor fear them. (The threat of danger) but increased the faith of them and they cried: Allah is Sufficient for us! Most Excellent is He in Whom we trust!